The best way to store citrus fruits is to keep them at room temperature if you plan to consume them within a week. However, if you want to keep them fresh for a longer time, you can store them in the refrigerator in a mesh bag. This helps to keep them dry and allows air to circulate, preventing mold growth. Do not store citrus fruits in a plastic bag or container as it can trap moisture and accelerate spoilage. Additionally, make sure to keep them away from other fruits and vegetables that emit ethylene gas, which can cause them to ripen and spoil quickly.